 - Graphtec GL100-WL-CO2 Data Logger with Carbon Dioxide Sensor- Manufacturer: Graphtec
 - Wireless Data logger with Carbon dioxide sensor, 4.9MB on-board memory, micro-SD memory slot, micro-B USB PC interface, LCD display Hayward, CA
 - Graphtec GL100-N-TH Data Logger with Temperature Humidity Sensor- Manufacturer: Graphtec
 Hayward, CA
 - Graphtec GL100-N-3AT Data Logger with Acceleration Temperature Sensor- Manufacturer: Graphtec
 Hayward, CA
 - Graphtec B-530 Humidity Sensor, 0 to 100% RH, for GL Dataloggers- Manufacturer: Graphtec
 Hayward, CA
 - Graphtec GL100-WL GL100 Main Unit, Standard Model, Required to Use with Sensor Units or Input Adapters- Manufacturer: Graphtec
 - GL100 main unit, WLAN model, Requires sensor or input terminal Hayward, CA

